Flush tank silencer



June 1, 1943. I -r 2,320,906

FLUSH TANK S ILENCER Filed Nov. 5, 1941 Patented June 1, 1943 FLUSH TANKSILENCER Franklin Bent, Los Angeles, Calll'., assignor to Janet M.Bales, Los Angeles, Calif.

Application November 5, 1941, Serial No. 417,883

2 Claims.

This invention relates to improvements in flush tank silencers, and maybe considered as an improvement over the low tank silencer disclosed inthe application of Wade V. Heare, Serial No. 405,333, filed August 4,1941, which issued on August 11, 1942, as Patent No. 2,292,689.

An object of the invention is to provide a flush tank silencerconsisting of a tubular rubber body capable of being telescoped over thehush tube of a flush tank which has its lower end normally closed butopenable through a slit, the sides of the slit being relatively thick soas to tend to cause the construction to retain its original shape.

Another object of the invention is to provide a flush tank silencerconsisting of a tubular rubber body adapted to be telescoped over thelower end of a hush tube having a normally closed lower end and whichhas an internal shoulder engageable by the bottom of the hush tube sothat the telescoping movement of the silencer onto the hush tube will beautomatically limited to position theopening from the silencer incorrect position with respect to the bottom of the hush tube.

A further object of the invention is to provide a silencer for flushtanks wherein the body is internally thickened adjacent its top toenable it to be applied to hush tubes of various sizes yet which willeffectively grip upon the hush tube to prevent the silencer from beingforced oil under the issuing water pressure.

With the foregoing and other objects in view, which will be mademanifest in the following detailed description and specifically pointedout in the appended claims, reference is had to the accompanying drawingfor an illustrative embodiment of the invention, wherein:

Figure 1 is a view in side elevation of the valve and hush tube in aflush tank, parts being broken away and shown in vertical section andillustrating the flush tank silencer embodying the present invention asapplied thereto;

Fig. 2 is a vertical section taken through the flush tank silencerembodying the present invention in the plane of the diametrioal slit andmay be regarded as a sectional View taken upon the line 2-2 upon Fig.

Fig. 3 is a sectional view through the silencer taken substantially uponthe line 33 upon Fig. 2;

Fig. 4 is a view in side elevation of the lower portion of the hush tubeillustrating the silencer embodying the present invention as having beenapplied thereto, the silencer being illustrated in vertical section; and

Fig. 5 is a horizontal section taken substantially upon the line 5-5upon Fig. 3.

Referring to the accompanying drawing wherein similar referencecharacters designate similar parts throughout, I0 indicates a watersupply pipe leading into a flush tank, the bottom of which is indicatedat H. 011 the top of the pipe l0 there is a valve I! that is controlledby a float, not shown, that is mounted on a float arm l3. l4 indicatesan elbow that connects the valve housing with a downwardly directed hushtube l 5.

The silencer embodying the present invention comprises a one-piecetubular rubber body 46 having a hemispherical, normally closed lower endI! that is traversed by a diametrical slit or knife-cut 18. The slit i8is very thin and the lips I9 and 20 on opposite sides thereof arenormally in contact with each other. On opposite sides of the slit thebody is internally thickened as indicated at 2|, and 22, so that the twoopposed sides are relatively thick and stiiT tending to keep the lips l9and 20 in engagement with each other. The end walls as indicated in Fig.4, are somewhat thinner as indicated at 23 and 24 and these thinportions thicken upwardly to provide upwardly facing shoulders 25engageable with the bottom of the hush tube l5 to limit upward movementof the silencer on the hush tube. Above the shoulder 25, the side wallsof the body are relatively thin as indicated at 26 and adjacent theupper end of the body it is again internally thickened as indicated at21, there being a downwardly divergent interior below the thickenedportion 2'! connecting the thickened portion with the thin side walls26.

The operation and advantages of the improved flush tank silencer are asfollows. The silencer is applied to the hush tube l5 by forcing it ontothe end of the hush tube. The chamfered or beveled entrance 28facilitates the application of the silencer to the hush tube. Duringthis application the thickened portion 2'1 is caused to expand asillustrated in Fig. 4. The silencer is forced onto the hush tube untilthe shoulder 25 engages the bottom of the hush tube. In this position asthe thickened portion 21 has been materially expanded it willeffectively grip the hush tube to keep the silencer in applied positionthereon.

When the valve i2 is opened, water passing therethrough from pipe ill tothe hush tube I5 forces the lips l9 and 20 apart. The issuing waterdischarges through the silencer in the form of a very thin, wide streamwhich is virtually noiseless. The resilient thickened portions 2| and 22continually urge the lips II and 20 into engagement so that the silencermaintains some back pressure in the hush tube that avoids chattering o!the valve II.

The improved silencer may be easily molded in rubber molds and appliedto the hush tube. Although the hush tube may vary in diameter theinternal diameter within the thickened portion 27 is such that thesilencer is applicable to virtually allordinary sizes. yet it is capableof I claim: a

1. A flush tank silencer comprising a tubular rubber body adapted to betelescoped onto a hush tube, the lower end of the body being normallyclosed and slitted, the portions of the body on opposite sides of theslit being thicker than the body portions at the ends of the slit. andthe tops of the relatively thin portions providing an upwardly racingshoulder engageable by the bottom of the hush tube.

2. A flush tank silencer comprising a tubular rubber body adapted to betelescoped onto the hush tube. the top oi! the body being internallythickened and the interior presenting walls diverging downwardly so thatthe walls of the body are relatively thin below the thickened portion.the bottom oi the body being hemispherically shaped and diametricallyslitted, the walls of the body on opposite sides of the slit beingthickened and the walls or the body at the ends oi. the slit beingupwardly thickened and forming upwardly facing shoulders engageable bythe bottom 0! a hush tube.

FRANKLIN BENT.

